Eyeglasses.



W. L. BREATH EYEGLASSBS.

APPLIOATIOH FILED AUG. 21, 1906.

Q'vitnao-Qo Y I nve'nf-oz @w Cmd ma PATENTED OCT. 8, 1907.

entre eternas rannfr einen WILLIAM L. BREATH, OF vNEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO ABNER F. ,BARKELEIM OF JERSEY CITY, NEW JERSEY.

EYEGLASSES.

Specification of Letters Patent.

Patented oct. e, i907.

Application filed August 2l, 1906. Serial No. 331,438.

To all whom it may concern:

Be it known that I, WILLIAM L. BREATH, a citizen of the United States, residing in the borough of Brooklyn, city of New York, county of Kings, and State of New York, have invented certain new and useful Improvements in Eyeglasses, of which the following is a specilication.

My invention relates to means for securing the springs and guards of eye glasses to the lens posts.

Ordinarily screws are used for the purpose, the ends of the springs, and the shanks of the guards, as well as the .lens posts being drilled for the reception of the screws, which however work loose sooner or later under the strain to which the parts are subjected in actual use, and not being conveniently accessible are the source of more or less trouble and discomfort. In other words while the structure is comparatively expensive, and involves the weakening of the parts, it is not sufficiently positive and reliable.

By my invention I am enabled to dispense with securing screws and still use bridge springs of the simplest and cheapest structure. Usually in devices designed to secure the ends of bridge springs and the Shanks of the guards to the lens posts without the use of screws each end of the bridge spring is specially constructed to interlock with adjoining parts, of the shank of the guard, resulting in complication and expense, and rendering the replacement or substitution of parts difficult. This I obviate by, and my invention consists in, the specific combination and arrangement of parts herein described and claimed, whereby a practically rigid connection between the several parts when forced together is attained in a simple, cheap and effective structurethe distinguishing feature of the structure being the formation of the lens posts each with a socket extending from one end thereof to the other with two opposed parallel sides and two opposed sides converging gradually and uniformly with relation to each other from one end of the post to the other, in conjunction with guards the shanks of which are formed with opposed parallel sides and with longitudinally convergent surfaces corresponding to and equal in length to the opposed convergent surfaces in the post sockets, so that when the plain, flat parallel-surfaced ends of bridge springs of uniform thickness are inserted in the sockets in the lens posts, and the shanks of the guards then inserted and forced home in said sockets, the ends of the bridge spring will be wedged in position longitudinally with relation to the lens posts and held therein against both lateral and longitudinal movement.

In the accompanying drawings, Figure 1, represents upon an enlarged scale, the lens posts in section and the spring and guards in elevation; Fig. 2, is an edge view of one of the lens posts; Fig. 3, a perspective view of the bridge spring; Fig. 4, an elevation of one -of the guards; Fig. 5, a like view showing a modification; Fig.

6, a sectional elevation showing the use of the modification.

The bridge spring S is of any ordinary construction except that I prefer to form its ends with lateral shoul.

ders or projections s, and to roughen (as at sf) the surfaces which come into actual Contact with the interior surfaces of the lens posts P, for the purpose of increasing frictional contact therewith.

Each lens post P is formed with a socket p extending through the post longitudinally from one end to the other, said socket having opposed parallel side walls, and also having opposed convergent surfaces p, p which are inclined uniformlywith relation to each other from the wider end or opening of the socket to the narrower end or opening thereof. The post is, of course, reversible on the lens. That is to say, the post P may be secured to the lens with the wide mouth of the socket uppermost, or the reverse. Hence the convergent surfaces g, gfon the shank g, of the guard G, may extend in either direction. Thus, in Figs. l and 4, the sur faces g/, g, converge downward while in Figs. 5 and 6, they converge upward, the result being essentially the same in either case in that the end of the shank is adapted to act as a wedge to secure itself and one end of the spring S within the socket p, of the post I.

The angle of inclination or convergence is the same, or substantially so, for both the opposed inner side walls of the socket and the taper on the end of the shank of the guard G, so that the end portion of the spring S which is of uniform thickness, is held firmly in direct Contact with both of the surfaces between which it is interposed. As a result, when the tapered end of the shank g, of the guard G is forced into the socket p, and against the end portion of the spring S, the parts are practically held rigidly together,-the frictional contact and engagement of surfaces being such that the parts can only be again loosened by forcibly and intentionally driving the tapered shank of the guard out of the socket.

What I claim as my invention and desire to secure by Letters Patent is,

1. In eyeglasses, the combination With a lens post having a socket with two opposite Walls parallel from end to end of the socket and the other two relatively inclined, a

bridge spring having flat paralleLfaeed end fitted in said l for the length of said socket and \\'edged therein with one socket, and a guard having a shank with a portion tapered side engaging the end of the spring, said soeket nnd shank for the length of said socket and wedged therein with one being shoulder-less whereby endwise movement only of the side engaging the end of the spring. shank secures the parts and interlocking of.v the gnnrd 5 2. In eyeglasses, the combination with a lens post havshank and spring is obviated.

ing a socket with two opposite walls parallel from end to WILLIAM I'.. BltlCAlll.

end of the socket and the other two relatively inclined, a Witnesses:

bridge spring having fiat parallel-faced end fitted in said D. W. GARDNER,

socket, and a guard having a shank with a portion tapered (ino. WM. Mm'r'r. 

